xref: /openbmc/u-boot/arch/arm/cpu/arm926ejs/spear/reset.c (revision 607232e4)
1 /*
2  * (C) Copyright 2009
3  * Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com.
4  *
5  * SPDX-License-Identifier:	GPL-2.0+
6  */
7 
8 #include <common.h>
9 #include <asm/io.h>
10 #include <asm/arch/hardware.h>
11 #include <asm/arch/spr_syscntl.h>
12 
13 void reset_cpu(ulong ignored)
14 {
15 	struct syscntl_regs *syscntl_regs_p =
16 	    (struct syscntl_regs *)CONFIG_SPEAR_SYSCNTLBASE;
17 
18 	printf("System is going to reboot ...\n");
19 
20 	/*
21 	 * This 1 second delay will allow the above message
22 	 * to be printed before reset
23 	 */
24 	udelay((1000 * 1000));
25 
26 	/* Going into slow mode before resetting SOC */
27 	writel(0x02, &syscntl_regs_p->scctrl);
28 
29 	/*
30 	 * Writing any value to the system status register will
31 	 * reset the SoC
32 	 */
33 	writel(0x00, &syscntl_regs_p->scsysstat);
34 
35 	/* system will restart */
36 	while (1)
37 		;
38 }
39